1.4.7 Continuum pore pressure elements

Product: ABAQUS/Standard

I. Plane strain elements with pore pressure

Problem description

Model:

Planar dimension	3 × 5
Gravity load vector	(1, 1, 0)

Material:

Young's modulus	1 × 10⁸
Poisson's ratio	0.0
Density	1.4142
Permeability	1 × 10^–5
Specific weight of fluid	1.0

Initial conditions:

Initial void ratio	1.0
Hydrostatic pressure datum	5.0
Hydrostatic pressure elevation	0.0
Sink pore pressure	14.7

Results and discussion

The calculated reactions are in agreement with the applied loads.

Input files

CPE4P element load tests:

ece4pfde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

ece4pfdl.inp

P, HP, Q, S.

ece4pfdr.inp

ROTA.

CPE4PH element load tests:

ece4phde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

ece4phdl.inp

P, HP, Q, S.

ece4phdr.inp

ROTA.

CPE4RP element load tests:

ece4prde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

ece4prdl.inp

P, HP, Q, S.

ece4prdr.inp

ROTA.

CPE4RPH element load tests:

ece4pyde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

ece4pydl.inp

P, HP, Q, S.

ece4pydr.inp

ROTA.

CPE6MP element load tests:

ece6pkde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, HP1, HP2, HP3, Q1, Q2, Q3, S1, S2, S3.

ece6pkdl.inp

P, HP, Q, S.

ece6pkdr.inp

ROTA.

CPE6MPH element load tests:

ece6plde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, HP1, HP2, HP3, Q1, Q2, Q3, S1, S2, S3.

ece6pldl.inp

P, HP, Q, S.

ece6pldr.inp

ROTA.

CPE8P element load tests:

ece8pfde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ece8pfdl.inp

P, HP, Q, QD, S.

ece8pfdr.inp

ROTA.

CPE8PH element load tests:

ece8phde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ece8phdl.inp

P, HP, Q, QD, S.

ece8phdr.inp

ROTA.

CPE8RP element load tests:

ece8prde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ece8prdl.inp

P, HP, Q, QD, S.

ece8prdr.inp

ROTA.

CPE8RPH element load tests:

ece8pyde.inp

CENTRIF, BX, BY, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ece8pydl.inp

P, HP, Q, QD, S.

ece8pydr.inp

ROTA.

II. Axisymmetric elements with pore pressure

Problem description

Model:

Planar dimension	3 × 5
Inside radius	1.0
Gravity load vector	(1, 1, 0)

Material:

Young's modulus	1 × 10⁸
Poisson's ratio	0.0
Density	1.4142
Permeability	1 × 10^–5
Specific weight of fluid	1.0

Initial conditions:

Initial void ratio	1.0
Hydrostatic pressure datum	5.0
Hydrostatic pressure elevation	0.0
Sink pore pressure	14.7

Results and discussion

The calculated reactions are in agreement with the applied loads.

Input files

CAX4P element load tests:

eca4pfde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

eca4pfdl.inp

P, HP, Q, S.

CAX4PH element load tests:

eca4phde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

eca4phdl.inp

P, HP, Q, S.

CAX4RP element load tests:

eca4prde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

eca4prdl.inp

P, HP, Q, S.

CAX4RPH element load tests:

eca4pyde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

eca4pydl.inp

P, HP, Q, S.

CAX6MP element load tests:

eca6pkde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, HP1, HP2, HP3, Q1, Q2, Q3, S1, S2, S3.

eca6pkdl.inp

P, HP, Q, S.

CAX6MPH element load tests:

eca6plde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, HP1, HP2, HP3, Q1, Q2, Q3, S1, S2, S3.

eca6pldl.inp

P, HP, Q, S.

CAX8P element load tests:

eca8pfde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

eca8pfdl.inp

P, HP, Q, QD, S.

CAX8PH element load tests:

eca8phde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

eca8phdl.inp

P, HP, Q, QD, S.

CAX8RP element load tests:

eca8prde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

eca8prdl.inp

P, HP, Q, QD, S.

CAX8RPH element load tests:

eca8pyde.inp

CENTRIF, BR, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

eca8pydl.inp

P, HP, Q, QD, S.

III. Three-dimensional elements with pore pressure

Problem description

Model:

Cubic dimension	3 × 5 × 1
Gravity load vector	(1, 1, 1)

Material:

Young's modulus	1 × 10⁸
Poisson's ratio	0.0
Density	1.7321
Permeability	1 × 10^–5
Specific weight of fluid	1.0

Initial conditions:

Initial void ratio	1.0
Hydrostatic pressure datum	5.0
Hydrostatic pressure elevation	0.0
Sink pore pressure	14.7

Results and discussion

The calculated reactions are in agreement with the applied loads.

Input files

C3D8P element load tests:

ec38pfde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, S1, S2, S3, S4, S5, S6.

ec38pfdl.inp

P, HP, Q, S.

ec38pfdr.inp

ROTA.

C3D8PH element load tests:

ec38phde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, S1, S2, S3, S4, S5, S6.

ec38phdl.inp

P, HP, Q, S.

ec38phdr.inp

ROTA.

C3D8RP element load tests:

ec38prde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, S1, S2, S3, S4, S5, S6.

ec38prdl.inp

P, HP, Q, S.

ec38prdr.inp

ROTA.

C3D8RPH element load tests:

ec38pyde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, S1, S2, S3, S4, S5, S6.

ec38pydl.inp

P, HP, Q, S.

ec38pydr.inp

ROTA.

C3D10MP element load tests:

ec3apkde.inp

CENTRIF, CFLOW, BX, BY, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

ec3apkdl.inp

P, HP, Q, S.

ec3apkdr.inp

ROTA.

C3D10MPH element load tests:

ec3aplde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, S1, S2, S3, S4.

ec3apldl.inp

P, HP, Q, S.

ec3apldr.inp

ROTA.

C3D20P element load tests:

ec3kpfde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, Q1D, Q2D, Q3D, Q4D, Q5D, Q6D, S1, S2, S3, S4, S5, S6.

ec3kpfde.f

User subroutines FLOW and DFLOW used in ec3kpfde.inp.

ec3kpfdl.inp

P, HP, Q, QD, S.

ec3kpfdr.inp

ROTA.

C3D20PH element load tests:

ec3kphde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, Q1D, Q2D, Q3D, Q4D, Q5D, Q6D, S1, S2, S3, S4, S5, S6.

ec3kphdl.inp

P, HP, Q, QD, S.

ec3kphdr.inp

ROTA.

C3D20RP element load tests:

ec3kprde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, Q1D, Q2D, Q3D, Q4D, Q5D, Q6D, S1, S2, S3, S4, S5, S6.

ec3kprdl.inp

P, HP, Q, QD, S.

ec3kprdr.inp

ROTA.

C3D20RPH element load tests:

ec3kpyde.inp

CENTRIF, BX, BY, BZ, GRAV, P1, P2, P3, P4, P5, P6, HP1, HP2, HP3, HP4, HP5, HP6, Q1, Q2, Q3, Q4, Q5, Q6, Q1D, Q2D, Q3D, Q4D, Q5D, Q6D, S1, S2, S3, S4, S5, S6.

ec3kpydl.inp

P, HP, Q, QD, S.

ec3kpydr.inp

ROTA.

IV. CAXA elements with pore pressure

Problem description

Model:

Planar dimension	3 × 5
Inside radius	1.0
Gravity load vector	(1, 1, 0)

Material:

Young's modulus	1 × 10⁸
Poisson's ratio	0.0
Density	1.4142
Permeability	1 × 10^–5
Specific weight of fluid	1.0

Initial conditions:

Initial void ratio	1.0
Hydrostatic pressure datum	5.0
Hydrostatic pressure elevation	0.0
Sink pore pressure	14.7

Results and discussion

The calculated reactions are in agreement with the applied loads.

Input files

ecnwpfde.inp

CAXA8P1: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ecnwprde.inp

CAXA8RP1: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ecnxpfde.inp

CAXA8P2: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ecnxprde.inp

CAXA8RP2: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ecnypfde.inp

CAXA8P3: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ecnyprde.inp

CAXA8RP3: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ecnzpfde.inp

CAXA8P4: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.

ecnzprde.inp

CAXA8RP4: BX, BZ, GRAV, P1, P2, P3, P4, HP1, HP2, HP3, HP4, Q1, Q2, Q3, Q4, Q1D, Q2D, Q3D, Q4D, S1, S2, S3, S4.